US4660524A - Fuel supply line - Google Patents

Fuel supply line Download PDF

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Publication number
US4660524A
US4660524A US06/712,052 US71205285A US4660524A US 4660524 A US4660524 A US 4660524A US 71205285 A US71205285 A US 71205285A US 4660524 A US4660524 A US 4660524A
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US
United States
Prior art keywords
supply line
fuel supply
wall section
fuel
fuel injection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/712,052
Inventor
Richard Bertsch
Dieter Gunther
Heinrich Knapp
Gunther Plapp
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Robert Bosch GmbH
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Robert Bosch GmbH
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Assigned to ROBERT BOSCH GMBH reassignment ROBERT BOSCH GMBH ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BERTSCH, RICHARD, GUNTHER, DIETER, KNAPP, HEINRICH, PLAPP, GUNTHER
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
    • F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations

Definitions

  • the invention is directed to fuel supply lines as described hereinafter.
  • Fuel supply are known, the walls of which are rigid and in which pressure dampers having elastic membranes are disposed in order to damp the pulsations of the fuel caused by the fuel supply pump and the intermittent action of the injection valves, as well as to avoid the transfer of annoying sounds to the vehicle body.
  • pressure damper To install a pressure damper in the fuel supply line does not only entail additional installation steps and causes space problems, but it also means additional costs.
  • the fuel supply line according to the invention has the advantage of preventing the pressure pulsations occuring in such fuel supply lines and the noises generated thereby without the need for additional steps.
  • the fuel supply line is especially advantageous to form the fuel supply line with an elastic wall section and a rigid wall section connected with it, on which the supports are disposed. This, given a sufficient rigidity of the entire fuel supply line, insures that the pressure pulsations which occur are damped by the elastic wall section and thereby noises are avoided. Because of space problems and for operational reasons a flat rectangular or triangular diameter of the fuel supply lines is found to be most advantageous.
  • FIG. 1 shows a partial view of a fuel supply line in a longitudinal direction
  • FIG. 2 is a cross sectional view of the fuel supply line along the line II--II;
  • FIG. 3 is a further exemplary embodiment of a fuel supply line according to the present invention in cross section.
  • FIG. 4 is an exemplary embodiment of a fuel supply line in accordance with the present invention with a rectangular cross section.
  • FIG. 1 partially shows a fuel supply line 1 in a longitudinal direction having supports 2, each of which are arranged to enshroud a fuel injection valve.
  • the fuel injection valves can be inserted into the supports 2 and fastened with clamps, also not shown.
  • FIG. 2 shows a cross section through the fuel supply line 1 in accordance with the present invention where the line is formed with a triangular diameter.
  • this device one of its wall sections 4, 5, 6 being least elastic enough, i.e., having thin walls, will damp the pressure pulsations of the fuel flowing through the fuel supply line 1. These pressure pulsations are known to be caused by the fuel supply pump, and, accordingly, this concept eliminates the creation of all noise from this source.
  • the wall sections 4, 5, 6 can all be made elastic and comprise for instance, sheet metal with a thickness of approximately 0.5 mm. Where the wall sections 4, 5, 6 meet, they can be connected by crimping or by means of welding or soldering. Such a fuel supply line could, of course, also be formed by a continuous extrusion process.
  • the fuel supply line is formed by an elastic wall section 8, which is triangular, and a rigid wall section 9 which can have a rectangular or trough-like shape.
  • the elastic wall section 8 has been made with such a thin wall that pressure pulsations are damped by it being deformed.
  • the elastic wall section has support walls 10 extending into the rigid wall section 9, and thereafter can be welded or soldered to it, for instance.
  • the rigid wall section 9 on which the supports 2 are disposed has a wall thickness sufficient to assure the necessary rigidity of the fuel supply line.
  • the fuel supply line is formed by a rectangular elastic wall section 12 and a rectangular or trough-like rigid wall section 13.
  • the elastic wall section 12 has such thin walls that the deformation thereof damps pressure pulsations.
  • the support walls 14, for instance, which partially surround the rigid wall section 13, are connected thereto by soldering, welding or crimping.
  • the rigid wall section 13, on which the supports 2 are disposed, has a wall thickness sufficient to assure the required rigidity of the fuel supply line.
  • a flat construction of the fuel supply line 1 is of considerable advantage, wherein the width B across the longitudinal direction is at least three times the height H.
  • the elastic wall section 8, 12 and the rigid wall section 13 are open at their ends facing each other and together surround the flow cross section of the fuel line 1.

Abstract

A fuel supply line for use with fuel injection devices of internal combustion engines is proposed, having supports to contain fuel injection valves. The fuel supply line has an elastic wall section, with which is connected a rigid wall section and on which are fastened the supports. The elastic wall section is elastic to the extent that it damps the pressure pulsations of the fuel in the fuel supply line, whereas the rigid wall section assures the required rigidity of the fuel supply line.

Description

BACKGROUND OF THE INVENTION
The invention is directed to fuel supply lines as described hereinafter. Fuel supply are known, the walls of which are rigid and in which pressure dampers having elastic membranes are disposed in order to damp the pulsations of the fuel caused by the fuel supply pump and the intermittent action of the injection valves, as well as to avoid the transfer of annoying sounds to the vehicle body. To install a pressure damper in the fuel supply line does not only entail additional installation steps and causes space problems, but it also means additional costs.
OBJECT AND SUMMARY OF THE INVENTION
In contrast to the foregoing, the fuel supply line according to the invention has the advantage of preventing the pressure pulsations occuring in such fuel supply lines and the noises generated thereby without the need for additional steps.
It is especially advantageous to form the fuel supply line with an elastic wall section and a rigid wall section connected with it, on which the supports are disposed. This, given a sufficient rigidity of the entire fuel supply line, insures that the pressure pulsations which occur are damped by the elastic wall section and thereby noises are avoided. Because of space problems and for operational reasons a flat rectangular or triangular diameter of the fuel supply lines is found to be most advantageous.
The invention will be better understood and further objects and advantages thereof will become more apparent from the ensuing detailed description of preferred embodiments taken in conjunction with the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a partial view of a fuel supply line in a longitudinal direction;
FIG. 2 is a cross sectional view of the fuel supply line along the line II--II;
FIG. 3 is a further exemplary embodiment of a fuel supply line according to the present invention in cross section; and
FIG. 4 is an exemplary embodiment of a fuel supply line in accordance with the present invention with a rectangular cross section.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIG. 1 partially shows a fuel supply line 1 in a longitudinal direction having supports 2, each of which are arranged to enshroud a fuel injection valve. The fuel injection valves, not shown, can be inserted into the supports 2 and fastened with clamps, also not shown.
FIG. 2 shows a cross section through the fuel supply line 1 in accordance with the present invention where the line is formed with a triangular diameter. In this device one of its wall sections 4, 5, 6 being least elastic enough, i.e., having thin walls, will damp the pressure pulsations of the fuel flowing through the fuel supply line 1. These pressure pulsations are known to be caused by the fuel supply pump, and, accordingly, this concept eliminates the creation of all noise from this source. The wall sections 4, 5, 6 can all be made elastic and comprise for instance, sheet metal with a thickness of approximately 0.5 mm. Where the wall sections 4, 5, 6 meet, they can be connected by crimping or by means of welding or soldering. Such a fuel supply line could, of course, also be formed by a continuous extrusion process.
In a further exemplary embodiment of a fuel supply line 1 in accordance with FIG. 3, the fuel supply line is formed by an elastic wall section 8, which is triangular, and a rigid wall section 9 which can have a rectangular or trough-like shape. The elastic wall section 8 has been made with such a thin wall that pressure pulsations are damped by it being deformed. The elastic wall section has support walls 10 extending into the rigid wall section 9, and thereafter can be welded or soldered to it, for instance. The rigid wall section 9 on which the supports 2 are disposed has a wall thickness sufficient to assure the necessary rigidity of the fuel supply line.
In the exemplary embodiment of a fuel supply line 1 in accordance with FIG. 4, the fuel supply line is formed by a rectangular elastic wall section 12 and a rectangular or trough-like rigid wall section 13. The elastic wall section 12 has such thin walls that the deformation thereof damps pressure pulsations. Additionally the support walls 14, for instance, which partially surround the rigid wall section 13, are connected thereto by soldering, welding or crimping. The rigid wall section 13, on which the supports 2 are disposed, has a wall thickness sufficient to assure the required rigidity of the fuel supply line. In cramped circumstances, particularly under the hood of an automative engine, a flat construction of the fuel supply line 1 is of considerable advantage, wherein the width B across the longitudinal direction is at least three times the height H.
The elastic wall section 8, 12 and the rigid wall section 13 are open at their ends facing each other and together surround the flow cross section of the fuel line 1.
The foregoing relates to preferred exemplary embodiments of the invention, it being understood that other variants and embodiments thereof are possible within the spirit and scope of the invention, the latter being defined by the appended claims.

Claims (8)

What is claimed and desired to be secured by Letters Patent of the United States is:
1. In a fuel supply of a fuel injection device for internal combustion engines having support means for fuel injection valves, the improvement comprising said fuel supply line having at least one thinly-walled section which is formed of an elastic material so pliable that pressure pulsations of the fuel in said fuel supply line are damped, said fuel supply line further having an elastic wall section arranged to extend in a longitudinal direction and a further rigid wall section connected therewith, said support means for said fuel injection valves being fastened to said rigid wall section, said elastic wall section and said rigid wall section forming a rectangle, and said fuel supply line further has a longitudinal direction, a predetermined width, and a height, said width being at least three times said height.
2. In a fuel supply line of a fuel injection device for internal combustion engines having support means for fuel injection valves, the improvement comprising said fuel supply line having at least one thinly-walled section which is formed of an elastic material so pliable that pressure pulsations of the fuel in said fuel supply line are damped, said fuel supply line further having an elastic wall section arranged to extend in a longitudinal direction and a further rigid wall section connected therewith, said support means for said fuel injection valves being fastened to said rigid wall section, said elastic wall section and said rigid wall section forming a rectangle, and said elastic wall section has portions which partially surround said rigid wall section.
3. In a fuel supply line of a fuel injection device for internal combustion engines having support means for fuel injection valves, the improvement comprising said fuel supply line having at least one thinly-walled section which is formed of an elastic material so pliable that pressure pulsations of the fuel in said fuel supply line are damped, said fuel supply line further having an elastic wall section arranged to extend in a longitudinal direction and a further rigid wall section connected therewith, said support means for said fuel injection valves being fastened to said rigid wall section and said elastic wall section has a triangular shape in cross-section and said rigid wall section has a rectangularly shaped portion.
4. A fuel supply line of a fuel injection device for internal combustion engines having support mean for fuel injection valves wherein said fuel supply line has at least one thinly-walled traingular section formed of a resilient metallic material, the resiliency of said material allowing pressure pulsations occurring in the fuel in said fuel supply line to be damped.
5. A fuel supply line of a fuel injection device for internal combustion engines having support means for fuel injection valves wherein a cross-section normal to the longitudinl axis of said fuel supply line including two distinct metallic walls, at least one of which is formed of a resilient material so pliable that pressure pulsations occurring in the fuel in said fuel supply line are damped.
6. A fuel supply line in accordance with claim 5, further wherein said at least one resilient wall is arranged to extend in a longitudinal direction and a further rigid wall section is connected therewith, and said support means for said fuel injection valves associated with said rigid wall section are fastened thereto.
7. A fuel supply line in accordance with claim 6, further wherein said resilient wall section and said rigid wall section comprise a rectangle.
8. A fuel supply line in accordance with claim 3, further wherein said elastic wall section is provided with support walls which extend into said rectangularly shaped portion.
US06/712,052 1984-05-10 1985-03-15 Fuel supply line Expired - Fee Related US4660524A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3417306 1984-05-10
DE3417306 1984-05-10
DE3432727 1984-09-06
DE19843432727 DE3432727A1 (en) 1984-05-10 1984-09-06 FUEL SUPPLY PIPE

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US4660524A true US4660524A (en) 1987-04-28

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US (1) US4660524A (en)
DE (1) DE3432727A1 (en)
FR (1) FR2564149B1 (en)
GB (1) GB2158512B (en)

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US4798187A (en) * 1986-11-07 1989-01-17 Sharon Manufacturing Company Low profile fuel injection rail
US5024198A (en) * 1989-06-06 1991-06-18 Usui Kokusai Sangyo Kaisha Ltd. Fuel delivery rail assembly
US5074269A (en) * 1991-04-29 1991-12-24 Chrysler Corporation Anti-rotation fuel injector clip
US5090385A (en) * 1989-12-08 1992-02-25 Usui Kokusai Sangyo Kaisha Ltd. Fuel delivery rail assembly
US5329899A (en) * 1993-10-12 1994-07-19 General Motors Corporation Fuel system pressure fuse
US5505181A (en) * 1995-02-13 1996-04-09 Siemens Automotive Corporation Integral pressure damper
US5575262A (en) * 1993-12-04 1996-11-19 Robert Bosch Gmbh Damper element for damping compressive oscillations and method for producing the same
US5617827A (en) * 1995-12-26 1997-04-08 General Motors Corporation Fuel rail
US5845621A (en) * 1997-06-19 1998-12-08 Siemens Automotive Corporation Bellows pressure pulsation damper
US5896843A (en) * 1997-11-24 1999-04-27 Siemens Automotive Corporation Fuel rail damper
US6135092A (en) * 1997-10-29 2000-10-24 General Motors Corporation Fuel injection system
US6138499A (en) * 1998-08-27 2000-10-31 Sun Electric Europe B.V. Exhaust emission analysis system incorporating pulse dampening
US6148798A (en) * 1999-10-01 2000-11-21 Delphi Technologies, Inc. Coaxial flow through fuel rail with a damper for a recirculating fuel system
US6205979B1 (en) 1998-11-24 2001-03-27 Robert Bosch Corporation Spring locator for damping device
US6223731B1 (en) * 1996-09-09 2001-05-01 Denso Corporation Fuel feeding apparatus with response delay compensation
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WO2002029241A2 (en) * 2000-10-04 2002-04-11 Siemens Automotive Corporation Fuel system including a fuel injector internally mounted to a fuel rail
US6371083B1 (en) 2000-11-20 2002-04-16 Robert Bosch Corporation Self-damping manifold
US6401691B1 (en) * 1998-10-22 2002-06-11 Nippon Soken, Inc. Fuel supply system for relieving fuel pressure pulsations and designing method thereof
US6418909B2 (en) 1998-11-24 2002-07-16 Robert Bosch Corporation Low cost hydraulic damper element and method for producing the same
EP1233174A2 (en) * 2001-02-15 2002-08-21 Delphi Technologies, Inc. Composite fuel rail with integral damping of the pressure pulsations and a co-injected non-permeation layer and method of fabricating same
WO2002079641A1 (en) * 2001-03-29 2002-10-10 Jfl Manufacturing Limited Metal tubular items and engine fuel injection systems and method for making same
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US6672286B2 (en) 2001-12-14 2004-01-06 Siemens Automotive Corporation Corrugated fuel rail damper
US20040016418A1 (en) * 2002-04-22 2004-01-29 Hikari Tsuchiya Fuel delivery rail assembly
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US6725839B2 (en) * 2002-05-29 2004-04-27 Millennium Industries Corp. Stamped metal fuel rail
US20040139947A1 (en) * 2002-10-18 2004-07-22 Yoshiyuki Serizawa Pulsation reducing system for fuel line
US20050039725A1 (en) * 2003-08-18 2005-02-24 Treusch Christopher John Fuel system having pressure pulsation damping
US20050045151A1 (en) * 2003-09-02 2005-03-03 Hitachi Unisia Automotive, Ltd. Fuel injection system and manufacturing method thereof
US20050109324A1 (en) * 2003-11-20 2005-05-26 Sanoh Kogyo Kabushiki Kaisha Fuel injection rail
US6901913B1 (en) * 2001-07-16 2005-06-07 Usui Kokusai Sangyo Kaisha Ltd. Fuel pressure pulsation suppressing system
US20050126540A1 (en) * 2003-12-16 2005-06-16 Braun Charles W. Fuel rail pulse damper with integral strengthening rib
US6948479B1 (en) * 2004-09-01 2005-09-27 Delphi Technologies, Inc. Inline pulsation damper system
US20050257774A1 (en) * 2002-10-11 2005-11-24 Masayoshi Usui Fuel delivery pipe
US7028668B1 (en) 2004-12-21 2006-04-18 Robert Bosch Gmbh Self-damping fuel rail
US20060081220A1 (en) * 2004-10-15 2006-04-20 Robert Bosch Gmbh Hydraulic damper element
US20080087253A1 (en) * 2004-10-15 2008-04-17 Robert Bosch Gmbh Hydraulic damper element
US20080142105A1 (en) * 2006-12-15 2008-06-19 Zdroik Michael J Fluid conduit assembly
US20080156299A1 (en) * 2006-12-27 2008-07-03 Thomas Sebastian Fuel distributor
US7493892B1 (en) * 2007-12-27 2009-02-24 Robert Bosch Gmbh Self-damping fuel rail
CN101260854B (en) * 2002-10-11 2011-01-26 臼井国际产业株式会社 Fuel delivery pipe
US8876502B2 (en) 2008-04-25 2014-11-04 Hitachi, Ltd. Mechanism for restraining fuel pressure pulsation and high pressure fuel supply pump of internal combustion engine with such mechanism
DE102017213387A1 (en) * 2017-08-02 2019-02-07 Robert Bosch Gmbh Distributor device for a water injection device of an internal combustion engine
US10690101B2 (en) * 2017-09-15 2020-06-23 Indian Motorcycle International, LLC Wheeled vehicle

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DE19807702A1 (en) 1998-02-24 1999-08-26 Bosch Gmbh Robert Damper element for fuel injection system
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JP6330721B2 (en) 2015-05-11 2018-05-30 トヨタ自動車株式会社 Fuel supply device

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Cited By (79)

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Publication number Priority date Publication date Assignee Title
US4798187A (en) * 1986-11-07 1989-01-17 Sharon Manufacturing Company Low profile fuel injection rail
US5024198A (en) * 1989-06-06 1991-06-18 Usui Kokusai Sangyo Kaisha Ltd. Fuel delivery rail assembly
US5090385A (en) * 1989-12-08 1992-02-25 Usui Kokusai Sangyo Kaisha Ltd. Fuel delivery rail assembly
US5074269A (en) * 1991-04-29 1991-12-24 Chrysler Corporation Anti-rotation fuel injector clip
US5329899A (en) * 1993-10-12 1994-07-19 General Motors Corporation Fuel system pressure fuse
US5575262A (en) * 1993-12-04 1996-11-19 Robert Bosch Gmbh Damper element for damping compressive oscillations and method for producing the same
US5505181A (en) * 1995-02-13 1996-04-09 Siemens Automotive Corporation Integral pressure damper
US5617827A (en) * 1995-12-26 1997-04-08 General Motors Corporation Fuel rail
US6230684B1 (en) * 1996-05-20 2001-05-15 Denso Corporation Fuel supply apparatus for direct injection type gasoline engine
US6223731B1 (en) * 1996-09-09 2001-05-01 Denso Corporation Fuel feeding apparatus with response delay compensation
US5845621A (en) * 1997-06-19 1998-12-08 Siemens Automotive Corporation Bellows pressure pulsation damper
EP0886066A1 (en) 1997-06-19 1998-12-23 Siemens Automotive Corporation Bellows pressure pulsation damper
US6135092A (en) * 1997-10-29 2000-10-24 General Motors Corporation Fuel injection system
US5896843A (en) * 1997-11-24 1999-04-27 Siemens Automotive Corporation Fuel rail damper
US6138499A (en) * 1998-08-27 2000-10-31 Sun Electric Europe B.V. Exhaust emission analysis system incorporating pulse dampening
US6401691B1 (en) * 1998-10-22 2002-06-11 Nippon Soken, Inc. Fuel supply system for relieving fuel pressure pulsations and designing method thereof
US6418909B2 (en) 1998-11-24 2002-07-16 Robert Bosch Corporation Low cost hydraulic damper element and method for producing the same
US6205979B1 (en) 1998-11-24 2001-03-27 Robert Bosch Corporation Spring locator for damping device
US6354273B1 (en) 1999-02-18 2002-03-12 Usui Kokusai Sangyo Kaisha Ltd. Fuel delivery rail assembly
US6470859B2 (en) 1999-02-18 2002-10-29 Usai Kokusai Sangyo Kaisha Ltd. Fuel delivery rail assembly
KR100678874B1 (en) * 1999-02-18 2007-02-07 우수이 고쿠사이 산교 가부시키가이샤 Fuel delivery pipe
US6148798A (en) * 1999-10-01 2000-11-21 Delphi Technologies, Inc. Coaxial flow through fuel rail with a damper for a recirculating fuel system
WO2002029241A3 (en) * 2000-10-04 2002-10-10 Siemens Automotive Corp Lp Fuel system including a fuel injector internally mounted to a fuel rail
US6598592B2 (en) 2000-10-04 2003-07-29 Seimens Automotive Corporation Fuel system including a fuel injector internally mounted to a fuel rail
WO2002029241A2 (en) * 2000-10-04 2002-04-11 Siemens Automotive Corporation Fuel system including a fuel injector internally mounted to a fuel rail
US6604510B2 (en) * 2000-10-04 2003-08-12 Siemens Automotive Corporation Fuel system including a fuel injector directly mounted to a fuel rail
US6371083B1 (en) 2000-11-20 2002-04-16 Robert Bosch Corporation Self-damping manifold
EP1233174A2 (en) * 2001-02-15 2002-08-21 Delphi Technologies, Inc. Composite fuel rail with integral damping of the pressure pulsations and a co-injected non-permeation layer and method of fabricating same
EP1233174A3 (en) * 2001-02-15 2004-05-19 Delphi Technologies, Inc. Composite fuel rail with integral damping of the pressure pulsations and a co-injected non-permeation layer and method of fabricating same
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Publication number Publication date
GB2158512A (en) 1985-11-13
FR2564149A1 (en) 1985-11-15
DE3432727A1 (en) 1985-11-14
FR2564149B1 (en) 1990-12-28
GB8511714D0 (en) 1985-06-19
GB2158512B (en) 1987-11-11

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